Cool Season Vegetables
These vegetables prefer cool growing temperatures and lose quality in hot weather. After they stop producing in summer, pull them from the garden and compost. They can be replanted in mid-summer for a fall harvest.
The Hardiest Cool-Season Crops:
These crops can be planted 4-6 weeks before the average last frost. Use a soil thermometer and when the soil is 40 degrees, it's warm enough for these seeds to germinate. They can tolerate daytime temperature as low as 40 degrees and will survive frosty nights. A touch of frost can actually enhance the flavors of these vegetables.
Semi-Hardy Cool Season Crops:
These crops can handle daytime temperatures of 40-50 degrees, but are slightly less tolerant of a frosty night. Cover them with seed cloth if the weather predicts cold night temperatures. Plant 3-4 weeks before the average last frost.